Green Corrosion Inhibition of Mild Steel by Hydrazone Derivatives in 1.0 M HCl

Abstract

In the present study, the inhibition performance of two synthesized hydrazone derivatives (HDZs), namely, (E)-N′-(2,4-dimethoxybenzylidene)-2-(6-methoxynaphthalen-2-yl) propanehydrazide (HYD-1) and N′-cyclohexylidene-2-(6-methoxynaphthalen-2-yl) propanehydrazide (HYD-2) on mild steel (MS) in 1.0 M HCl was investigated using weight loss measurements, electrochemical techniques, and scanning electron microscope (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX). The experimental data suggested that the hydrazone derivatives exhibited a high inhibition performance, which increases with increasing their concentrations. HYD-1 and HYD-2 presented maximum inhibition efficiencies of 96% and 84%, respectively, at an optimal concentration of 5 × 10–3 M. The principal observations that resulted from electrochemical studies are that HYDs affected both anodic and cathodic reactions (mixed inhibitors). Their adsorption, which is a combination of chemisorption and physisorption, obeyed the Langmuir isotherm model. Furthermore, the temperature effect was carried out at various temperatures ranging from 303 to 333 K to verify the corrosion inhibition performance of HYD-1 at higher temperatures. Moreover, SEM-EDX analysis confirmed that HYDs can ensure remarkable prevention against corrosion through the adsorption onto the metal surface.

A Green Approach: Evaluation of Combretum indicum (CI) Leaf Extract as an Eco-friendly Corrosion Inhibitor for Mild Steel in 1M HCl

“…However, a significant decrease in the C dl with an increase in CI leaf extract was observed due to the decrease in the dielectric constant of the protective layer by replacing the pre-adsorbed water molecules. Decreased dielectric constant strengthens the adsorption capability of CI leaf extract [30,31]. This can be explained by better coverage and protection of the mild steel metal against dissolution, as confirmed by the increase in inhibition performance with the concentration of the CI leaf extract as shown in Table 2 Bode plots for mild steel in an acidic environment at varying temperatures (303-323 K) are represented in Fig.…”

Experimental, DFT and MD Assessments of Bark Extract of Tamarix aphylla as Corrosion Inhibitor for Carbon Steel Used in Desalination Plants

“…Various BTA concentrations were added at 298 K to the corrosive medium in order to examine the effect of BTA concentration on the inhibition process. The corrosion rate in millimetres per year (mm/y) was determined by Equation (1) [ 9 ]: where the constant K is equal to 8.76 × 10 4 , and w and t represent the mass loss in grams and the exposure time in hours, respectively. The inhibition efficiency and the surface coverage (θ) were determined by Equations (2) and (3) [ 9 ]: where and are the corrosion rates in the presence and absence of various BTA concentrations, respectively, and θ is the degree of surface coverage.…”

“…In recent years, extracts of natural substances have attracted some attention for their potential as eco-friendly, non-toxic, and biodegradable corrosion inhibitors [ 5 , 6 , 7 , 8 , 9 , 10 ]. These constituents can be obtained using inexpensive and straightforward techniques.…”

Impediment of Iron Corrosion by N,N′-Bis[2-hydroxynaphthylidene]amino]oxamide in 3.5% NaCl Solution

“…Moreover, 1,1 -thiocarbonyldiimidazole [9], 5-(3-aminophenyl)tetrazole [10], sodium 2- (4-(benzo[d]thiazol-2-ylthio)-6-(hexylamino)-1,3,5-triazin-2-ylamino)ethanesulfonate [11], (3-amino-1,2,4-triazole-5-thiol and 1,1 -thiocarbonyldiimidazole) [12], (2-sulfhydryl)-(5-phenmethyl)-(1-(4-phenol)-methanimine)-triazole [13], 1-butyl-3-methyli midazolium chloride [14], polyethyleneimine [15], and cetylpyridinium chloride [16] have been tested as inhibitors for different species of iron in the same medium. With respect to hydrazones, some compounds have been examined as inhibitors in various media for different metals, especially for iron species, which have shown potential inhibition efficiency [17][18][19][20][21][22][23][24]. N,N -bis[2-hydroxynaphthylidene]amino]oxamide, which is regarded as one of the hydrazone compounds, was employed as a corrosion inhibitor towards the aluminum, copper, and carbon-steel in 1M HCl solutions using traditional weight loss measurements [25][26][27].…”